Thermostatically-controlled throttling device



sept. 25,1923. 1,468,689

W. E. ERNST THERMOSTATICALLY CONTROLLED THROTTLING DEVICE Filed Feb. 9,1922 IM da d! ce Patented Sept. 25, 1923.

WILHELM EBERHARD ERNST, OF BERLIN-SCHONEBERG, GERMANY.

THERMOSTATICALLY-CONTROLLED TITROTTLING DEVICE.

Application led February 9, 1922. Serial No. 535,262.

To all whom. t may concern: l

Be it known that I, WILHELM EBERHARD ERNST, engineer, citizen of GermanRepublic, r'esidinov at Berlin-Sclioneberg, in the State of lrussia,Germany` have invented certain new and useful Improvements in a Thermostatically-Controlled Throttling Device, of which the following isa specification.

Attempts have been made to make use of thermostatically controlledtlirottling members in conduits for fluids for the purpose'of regulatingthe amount of fluid pass ing through `the same, but the forms ofconstruction of the throttling members as hitherto devised provedinsutlicient for thc purpose in view.

. Thermostats capable ofdirectly and sensitively responding tovariations of temperature did not produce such regulation forces andWays as necessary for actuating the throttling members, whereas morepowerfully acting thermostats were not sensitive enough.

A practically utilizable control 1s rendered possible, however, byemploying, instead of the valves as hitherto made use of, a slide'or, aplurality of slides, preferably two, which are moved ino positedirections, and by actuating the s ide or slides, not as formerly by aliquid-thermostat@but by a bi-metallic thermostat, as describedhereinafter.

Throttliiig members controlled by such thermostats may be` utilized formany purposes, such, for instance, as the regulation of the amount of acirculating fluid, for instance in a heating plant or in a distilling orcooling plant, especially in the cooling jackets of the cylinders ofinternal combustion engines, and the like.

Two forms of construction ofmy improved device are shown, by Wayofeirample, in the accompanying drawing, 1n which Figure l is an axialsection through one of then; Figure 2 is a sectional view taken on lineA-A of Fig. l, and Figure 3 is also an -axial section and relates to amodified form of construction.

Referring to Figure l, a and b are the respective halves of the casingof the device, and c1 and c2 are two rotary slides having each at leastone cut-out portion, but preferably a plurality of such while d1 and d2are two thermostatic expansion bodies. The fluid enters the device inthe direction of the lefthand arrow, contacts with, and heats theexpansion bodies, and leaves the casing al the opposite end'l 4There maybe means for adjusting the rotary slides by hand from the outer side ofthe casing; and such means may be of any desired or suitableconstruction. e indicates such a means in the example in question;permitting the regulation of the amount of fluid that passes through thedevice in a certain time and, thus, to regulate also the temperature forinstance of the water discharged from an internal combustion engine orthe like having the device attached to it. The regulation starts fromdetermining by hand, by means of the device e, the initial position ofthe rotary slides, after which the regulation proper is automaticallyeffected by the action of the tlieriiiostatic members upon the thusadjusted slides.

f is a thermometer, which is located in a groove of the casing and isprotected in and by that groove. It allows of watching the outlettemperature of the cooling fluid. m and u are branches of the casing andserve for connectin it `on the one side with a cooling Huid pipe and onthe other side with a radiator.y These connectionsmay be effected bylshort pieces of hose.

In the form of construction shown in Figure 1 the thermostatie expansionbodies a?L and d2 are attached to a centrally arranged axle lc carryingalso the rotary lslides c1 and c2. The latter are pressed against acentral collar h by spiral springs g` and z', of which g iscomparatively wea whereas i is comparatively strong. Each slide iscapable of a short axial motion upon the common axle of the parts inquestion, that motion being bounded in the one direction by the collar hand in the other direction by the associate expansion body.

the pressure difference at the slides sur-l passes a certain limit asdetermined by the stronger spring z', the rear slide gives way and ismoved off the collar i whereby the cooling iuid is allowed to flow fromthe one side of the deviceto the other side without regard to therelative position of the cutoff edges of the slides as determined by thetemperature, or by the position of the thermost-ats respectively.

The manner of operation is as follows: The cooling fluid flows throughthe device in the direction indicated by the arrows and heats thethermostatic bodies which correspondingly expand and turn the slides in'i opposite dlrectionsso that their cut out por- Inv the form ofconstruction shown in` Figure 3, the eiects of the two thermostats areobtained by letting the one of them act -upon the other and letting thislatter ther` mostat act upon the rotary slide, there being only one suchslide in this embodiment. Insteadof the slide c1 (Fig. 1),a stationaryplate 'Z is used having passages like that slide. The plate or disk lsupports the axle or spindle lcy which in its turn carries thethermostatic bodies d1 and d2. The motion which the body d1 produces istransferred to the body d2, that is to say, it is transferred also tothe rotary slide c2, but only by means of the body d2; and the motion,owever, which the body d2 produces is transferred directly to the slide,thev whole amount of motion transferred to the slide being, thus., thesum of the two single motions of the two thermostatic bodies., It isobvious that instead of only two thermostats, three or more may bearranged in seriesin the manner just described. Y j

All'operating parts operate automatically within the fluid. None of themare ex osed to any outer influence and no slide ax e extends outwards sothat any disturbance by an outer cause is obviated.-

Making user of rotary slides and of bimetallic thermostats permits of avery compact construction of the device whereby it is made possible toinsert it, for instance,

into the existing hose-connection between the radiator and the coolingwater conduit of an internal combustion engine or the like.v

The casing is, for that purpose, provided with branches m and n.

Having now described my invention, what I desire to secure by a patentof the United Statesis: y y

1. A thermostatic throttling device comprising a casing; an axlemounted'in said casing having a central collar; a rotary slide mountedon said axle and on each side of said collar; a bi-metallic thermostatmounted on said axle and adjacent each slide,

1,4es,eso

aid Athermostatshaving connections to its res ective slide; and vaspiral spring between eac thermostat and its res ective slide so thatsaid slides are force against each other. i

2. A thermostatic throttling device comprising a casing; an axle mountedin said casing; a slide'mounted on said axle; a plu? rality ofthermostats mounted on said axle and in the direct path of a fluidforced through said casing; a spiral spring between said slide and oneof said thermostat's; and means connecting one of said thermostats with`said slide in order that the plurality of cooperating thermostats shallymove vsaid slide by variation of fluid temperature.

3. A thermostatic throttling device, comprising, in combination, twoco-axially arranged rotary slides; a bi-metallic expansion-body on eachside of said slides; separated motion-transmitting connections betweenthe expansion bodies and the slides; means including an axle forsupporting the slides and the bodies; and a casing enclosring the saidparts.

4. A thermostaticthrottling device, comprisin ,in combination, twoco-axiallyarrange rota slides located side by side; two bi-metal icexpansion-bodies, of which one is located at the one side of saidslides, the other at the other side; separated motion transmittingconnections between the expansion bodies and the slides; means forsupporting the slides and the bodies ;"a nd a casing enclosing the saidparts.

5. A thermostatic throttling device, comprising, in combination, anaxially displaceable rotaryslide; an abutment for said slide; a springso arran d as to be adapted to press the slide against said abutment; abime'tallic expansion body; a motion-transmitting connection betweensaid slide and said' body; means for supporting the slide and the body;and a casing enclosing the l said parts.

6. A thermostatie ,throttlin device, comprising, incombination, a sli e;a bi-metallic Vexpansion-body; a motion-transmitting.

connection between said slide and said body; means for supporting the`slide and the body; a casing enclosing the said parts and havin anouter groove; and a thermometer in sai groove, as set forth.

In testimony whereof I-have aixed'my signature.

WILHELM BERHARD ERNST.

